William t



UNITED STATES FATENT UFFFICE.

WILLIAM T. LEAGH, OF EAST WAREHAM, MASSAGIUSETTS.

FORGINGr-MACHINE.

Specification oLLetters Patent No. 27,550, dated March 20, 1860.

To all whom t may concern.'

Be it known that I, VILLIAM T. LEAGH, of East iVarehaim in the count-y of Plymouth and State of Massachusetts, have invented a new and useful Improvement in Machinery for Forging Nails and other Articles; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure l, is a vertical section of a forging machine with my improvement applied. Fig. 2, is a plan of the same. Fig. 3, is a V back view of the upper hammer shaft, hammer and the connections of the hammer with the shaft. Fig. 4, is a transverse section of the said hammer shaft, and the hammer connections.

Similar letters of reference indicate corresponding parts in the several igures.

ldy invention relates more particularly to the machinery which constitutes the subject mat-ter of Letters Patent of the United States granted to Samuel J. Seely dated August et, 1857, and consists in an improve-d mode of applying the hammers in combination with their rock-shafts for the purpose of preventing the breakage of the hammer arms or other connections of the rock-shafts.

To enable others skilled in the art to apply my invention to use l will proceed to describe its construction and operation.

A is the rock-shaft of the upper hammer mounted bet-Ween two adjust-able centers a, (z, in two heads of the framing M, and having rigidly attached a slotted arm B, whose slot b, receives a crank pin c, carried by the rotary main shaft C, of the machine, said crank pin by its action in the said slot produced by its rotation with the main shaft, serving to produce the necessary rocking movement of the rock-shaft, as described in the specification of the aforesaid Letters Patent of S. J. Seely.

D, is the upper hammer att-ached to an arm E, which projects from a hub F, which is fitted to turn loosely on the rock-shaft A. This hub F, instead of being furnished with a stud entering a mortise in an arm of the rock shaft, provided, with set screws on each side of the said stud, is furnished with which is parallel with the rock-shaft, is re- A ceived within a wide mortise in an arm I, of the rock-shaft resembling the arm described in Seelys specification for receiving the st-ud of the hammer hub, said arm I, being provided with two set screws K, K, one on each side of the stud Gr, and having india-rubber springs J, J, shown in Fig. t, applied between the said screws and the said stud. These set screws J, J, are so adjusted that when the face of the hammer has struck t-he nail t, or other article being forged, the back of the short arm d, of the hammer hub, is free of the back of the slo-t c, in the stud as shown in Fig. l. By this mode of litt-ing the hamm-er it is caused to oscillate back and forth to strike the article being forged in the same way as in the machine described in Seelys speciication, but by the play allowed to the arm al, in the slot c, of the stud Gr, the blo-w of the hammer is caused to have the character of a blow struck by a hammer held loosely in the hand, and the concussion of the blow is prevented being transmitted beyond the arm (Z, and the breakage of the hammer arm and other parts of the hammer connections which has frequently occurred in Seelys machine, constructed as described in his. specification, notwithstand` ing the application of the india-rubber springs J, J, to the stud, is prevented.

The hub F, of the lower hammer D', is furnished with an arm d, which is fitted to a stud Gr', applied in combination with the rock-shaft A', all of which parts are precisely like the connect-ions between the hammer D, and the rock shaft A.

that I claim as my invention and desire to secure by Letters Patent is The combination of the arm (l, of the hammer hub, the mortised stud Gr, and the mortised arm T, of the hammer rock shaft, the who-le applied and operating together substantially as herein set forth.

TWILLIAM T. LEAGH.

fitnesses C. F. A. lVns'roN, B. D. W. BERTLETT. 

